<?php
/**
 * Smarty plugin
 *
 * @package Smarty
 * @subpackage PluginsModifier
 */

/**
 * Smarty regex_replace modifier plugin
 *
 * Type:     modifier<br>
 * Name:     regex_replace<br>
 * Purpose:  regular expression search/replace
 * @link http://smarty.php.net/manual/en/language.modifier.regex.replace.php
 * regex_replace (Smarty online manual)
 * @author   Monte Ohrt <monte at ohrt dot com>
 * @param string
 * @param string|array
 * @param string|array
 * @return string
 */
function smarty_modifier_regex_replace($string, $search, $replace) {
	if (is_array ( $search )) {
		foreach ( $search as $idx => $s )
			$search [$idx] = _smarty_regex_replace_check ( $s );
	} else {
		$search = _smarty_regex_replace_check ( $search );
	}
	
	return preg_replace ( $search, $replace, $string );
}

function _smarty_regex_replace_check($search) {
	if (($pos = strpos ( $search, "\0" )) !== false)
		$search = substr ( $search, 0, $pos );
	if (preg_match ( '!([a-zA-Z\s]+)$!s', $search, $match ) && (strpos ( $match [1], 'e' ) !== false)) {
		/* remove eval-modifier from $search */
		$search = substr ( $search, 0, - strlen ( $match [1] ) ) . preg_replace ( '![e\s]+!', '', $match [1] );
	}
	return $search;
}

?>